ICD-10 I44.4
Billable / SpecificLeft anterior fascicular block
About ICD-10-CM I44.4
ICD-10-CM code I44.4 represents Left anterior fascicular block. This is a billable/specific code in the Circulatory System chapter (block I44). The 2026 edition of ICD-10-CM I44.4 became effective on October 1, 2025.
Medicare LCD Coverage for I44.4
Local Coverage Determinations (LCDs) from CMS MACs that list I44.4 as a covered diagnosis.
Showing top 10 of 335 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I44.4.
2 Aetna
5 Medicare
CPT Codes Commonly Billed with I44.4
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93281 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93280 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93296 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93279 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93283 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93261 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93288 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93282 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93724 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93286 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
Convert I44.4 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I44.4 | 4262 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I44.4
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I44.4, Billing FAQ
Is ICD-10 code I44.4 billable? +
Yes, I44.4 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What CPT codes are commonly billed with I44.4? +
Procedures frequently paired with I44.4 include: 93281, 93280, 93296, 93279, 93283.
What ICD-9 codes does I44.4 map to? +
Per CMS GEMs, I44.4 maps to ICD-9 codes: 4262. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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